Polishing
Mechanical polishing: By using tools such as sandpaper, sandbelts and grinding wheels, the surface of the mold is gradually polished from coarse to fine,which removing machining marks , micro defects and improving surface smoothness and smoothness.
Chemical polishing: Using a chemical solution to corrode the surface of the mold, allowing the micro protrusions to dissolve preferentially, thereby achieving a smooth and bright effect. Chemical polishing can achieve a relatively uniform surface, but it is difficult to control.
Electrolytic polishing: Through electrolysis, the micro protrusions on the surface of the mold are preferentially dissolved, thereby achieving polishing. Electrolytic polishing can achieve a high surface finish and improve the corrosion resistance of the surface.
Electroplate
Chromium plating: Chromium plating has extremely high hardness and wear resistance, which can significantly improve the wear resistance of the mold surface, while also having good corrosion resistance and decorative appearance.
Nickel plating: Nickel plating has good corrosion resistance and decorative properties, can provide a smooth surface, and to some extent improve the hardness of the mold.
Nitriding treatment
Gas nitriding: Place the mold in a nitrogen-containing atmosphere and allow nitrogen atoms to penetrate the surface of the mold at a certain temperature, forming a nitriding layer. Nitriding treatment can improve the hardness, wear resistance, corrosion resistance, and fatigue resistance of the mold surface, while maintaining the dimensional accuracy of the mold.
Ion nitriding: Using ions to bombard the surface of the mold, causing it to heat up and undergo nitriding treatment. Ionic nitriding has the advantages of fast nitriding speed, good nitriding layer quality, and small deformation.
Coating treatment
PVD (Physical Vapor Deposition) coating: The material is deposited on the surface of the mold through physical processes, forming a thin and hard coating, such as TiN (Titanium Nitride), CrN (Chromium Nitride), etc. PVD coating has high hardness, low friction coefficient, good corrosion resistance and wear resistance, which can significantly improve the service life and surface quality of molds.
CVD (Chemical Vapor Deposition) coating: Using chemical reactions to generate coatings on the surface of the mold, such as TiC (Titanium Carbide), Al2O3 (Aluminum Oxide), etc. CVD coatings have excellent performance, but high processing temperatures may have a certain impact on the substrate material of the mold.
In summary, when selecting mold materials and surface finishing methods, it is necessary to comprehensively consider various factors such as precision requirements, complexity, production batch size, cost budget, and expected service life of liquid silicone products. For liquid silicone products with extremely high precision requirements, large production batches, and strict performance requirements, priority should be given to selecting high-performance mold materials (such as H13 steel) and combining advanced surface treatment technologies (such as PVD coating) to ensure that the quality and performance of the mold can meet production needs; For projects with relatively low precision requirements, small batch production, or cost sensitivity, more economical and practical materials and processing methods can be selected according to the actual situation.
Guangzhou S-guangyu Machinery & Equipment Co.,Ltd is a professional liquid silicone rubber(LSR) Injection molding machine manufacturers in China since 2010.We have got more than one hundred patents and serve for more than thousands of customers .if you want to learn more about our machines,please visit our web www.lsrexpert-better.com or contact us:86-13902294163.
